how much boost can stock headgaskets take? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sL103 · 04-06-2003, 08:55 PM

since i did a very nice build up on a 300ZX this summer we opted not to go with a copper gasket because according to a well known source the stock head gasket could take 29lbs of boost before blowing, Does anyone know what the rb25det would take before it belows i know it has a lower compression than that of a 300ZX tt respectively at 9:1:1 i know the rb20det is at 8:1:1 is that right?? and is the rb25det at 8:5:1?? has anyone used an aftermarket headgasket like HKS/NISMO/or Power Industries??
just checking with the guys that have done the rb25det swap

thank you, Shawn

04-06-2003, 08:55 PM	#1
sL103 Leaky Injector Join Date: Jan 2003 Location: bloomington ,IL Age: 44 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	how much boost can stock headgaskets take? since i did a very nice build up on a 300ZX this summer we opted not to go with a copper gasket because according to a well known source the stock head gasket could take 29lbs of boost before blowing, Does anyone know what the rb25det would take before it belows i know it has a lower compression than that of a 300ZX tt respectively at 9:1:1 i know the rb20det is at 8:1:1 is that right?? and is the rb25det at 8:5:1?? has anyone used an aftermarket headgasket like HKS/NISMO/or Power Industries?? just checking with the guys that have done the rb25det swap thank you, Shawn

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